/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <stdbool.h> #include <stdio.h> #include <sys/prctl.h> #include <unistd.h> #include "process-util.h" #include "signal-util.h" #include "string-util.h" #include "util.h" #include "proc-cmdline.h" static bool arg_skip = false; static bool arg_force = false; static int parse_proc_cmdline_item(const char *key, const char *value) { if (streq(key, "quotacheck.mode") && value) { if (streq(value, "auto")) arg_force = arg_skip = false; else if (streq(value, "force")) arg_force = true; else if (streq(value, "skip")) arg_skip = true; else log_warning("Invalid quotacheck.mode= parameter '%s'. Ignoring.", value); } #ifdef HAVE_SYSV_COMPAT else if (streq(key, "forcequotacheck") && !value) { log_warning("Please use 'quotacheck.mode=force' rather than 'forcequotacheck' on the kernel command line."); arg_force = true; } #endif return 0; } static void test_files(void) { #ifdef HAVE_SYSV_COMPAT if (access("/forcequotacheck", F_OK) >= 0) { log_error("Please pass 'quotacheck.mode=force' on the kernel command line rather than creating /forcequotacheck on the root file system."); arg_force = true; } #endif } int main(int argc, char *argv[]) { static const char * const cmdline[] = { QUOTACHECK, "-anug", NULL }; pid_t pid; int r; if (argc > 1) { log_error("This program takes no arguments."); return EXIT_FAILURE; } log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); r = parse_proc_cmdline(parse_proc_cmdline_item); if (r < 0) log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); test_files(); if (!arg_force) { if (arg_skip) return EXIT_SUCCESS; if (access("/run/systemd/quotacheck", F_OK) < 0) return EXIT_SUCCESS; } pid = fork(); if (pid < 0) { log_error_errno(errno, "fork(): %m"); return EXIT_FAILURE; } else if (pid == 0) { /* Child */ (void) reset_all_signal_handlers(); (void) reset_signal_mask(); assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); execv(cmdline[0], (char**) cmdline); _exit(1); /* Operational error */ } r = wait_for_terminate_and_warn("quotacheck", pid, true); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }